The 10 and 20 khz would be useable for coins, 30 and 40 more so for Gold coins,raw gold(nuggets) and Gold jewelry. probably good tool for tot lot Gold hunters, beach hunters and Gold prospecting. I use 12 and 18 most of the time now. I'm not sure about relics but all the new frequencies might be OK for that? The new coil will most likely allow detecting in tighter spots such as nugget rich environments and trashy areas like tot lots. Just my perception of what I see.
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